Abstract
Post harvest processes of potato tubers are crucially important to keep crop losses at a minimum. Besides stacks dimensions, arrangement of potato stacks within commercial cold stores is one of the main reasons causing storage losses and low potato tubers quality. This research attempted to investigate the influence of storage duration and stacks height on physical properties of two potato varieties (Diamont and Invootar). The cold store was kept at 4-10 oC and 65-70% relative humidity. The results showed that the change rate in length, width and thickness was higher in diamond variety more than Invootar variety at all investigated stacks height. Surface area of potato tubers increased with increasing stacks height and decreased with storage duration. Temperature within the stacks decreased with the treatments at 3 and 6 m stack height that improved potato quality parameters. The results therefore revealed that selecting the optimum potato stacks height can improve the movement of air through stacks and also improve heat transfer within the stack.
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